IstaIt has been more than 20 years since Tzong Yang Aquarium Co. was founded as a tropical fish breeder. After 20 years, they are no longer a breeder of tropical fishes, their dedication in accessories development has transformed them to be a manufacturer of many quality aquarium accessories that you know as Ista planted aquarium products.

These 20 years of experience in the aquarium field enables them to understand the specific demands of the hobbyist. Based on this understanding, the talented design team is able to develop products which are unique, professional and fit into the market trend. Innovation and quality assurance is the spirit Ista is proud of and because of this, their business partners in different countries can always stay one step ahead from others in the market of competition.

LOVE this filter

by
DIMITRI KLIMENKO

Excellent!

Posted: 1/16/2014 from FAIRFAX, VA UNITED STATES

5.05

Experience Level:
Intermediate

Comments:My wife calls this small filter, "cute", ...I think it's indispensable.
It's hard to find a reliable filter that can handle a small talk (grow-out tank) without killing the fry or other inhabitants with too high a flow. This little bio-sponge is not only properly suited for flow considerations, but the filter material is perfectly sized for fry or baby shrimp. Almost every other brand uses sponge material with larger pores.
For aquariums 2-5 gallons, give this a try.

Works great.

by
AMERICO RODRIGUEZ

Excellent!

Posted: 6/13/2012 from GLENDALE, NY UNITED STATES

5.05

Experience Level:
Intermediate

Comments:You will not find it cheaper any where else. Perfect in helping to keep tank crystal clear & your bioload steady. The bubbles come out at the right size not breaking up the surface. Quite & reliable. You will find fish & your tank cleaners feasting on the sponge. Getting at the debri stuck on to the sponge helping you from cleaning it sooner then you needed.

Bubbles not finely diffused

by
EDWARD CLEAVER

Average

Posted: 3/21/2012 from KOKOMO, IN UNITED STATES

3.05

Experience Level:
Intermediate

Comments:I love the size of this filter for my 5 gallon planted shrimp tank. However, the bubbles are not finely diffused which disturbs the water's surface and probably doesn't oxygenate the tank as well either. I took this apart to see if I could put a diffuser stone inside the assembly and this did not seem possible without significantly altering and possible ruining the plastic pieces which hold the sponge in place. If this item had better oxygen diffusion I think it would deserve a 5 star rating!

inefective

by
FRANK BETANCOURT

Unsatisfactory

Posted: 1/9/2012 from NORCROSS, GA UNITED STATES

1.05

Experience Level:
Expert

Comments:The air lift tubing is to short, making the draw through the sponge innefective. The built in air difuser does not break the pump air into small bubbles creating large bubbles and making it rather noisy.

Bio Sponge

by
JOEL CLARK

Excellent!

Posted: 12/27/2010 from Parkville, MO UNITED STATES

5.05

Experience Level:
Intermediate

Comments:Great product to build up biological filter to move between quarantine tanks. I am also using these as a air driven backup to my breeding tank system. Air provides backup in case of power outage and main pump stops.

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Ista Hydro Bio Sponge Filter

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